RECOMMENDED PRACTICE FOR DETERMINING THE ELECTRIC POWER STATION GROUND POTENTIAL RISE AND INDUCED VOLTAGE FROM A POWER FAULT
Institute of Electrical & Electronics Engineers
1. Overview
2. Normative references
3. Definitions, acronyms, and abbreviations
4. Overview of technical considerations
5. Electrical power station GPR
6. Calculation of electromagnetic induction
under power fault conditions
7. Vectorial summation of a GPR with an LI voltage
8. Power system fault current probability
9. ZOI of GPR
10. Summary of mitigating and reduction factors
applicable to GPR or induced voltage, or both
11. Communication channel time requirements
12. Administrative guidelines for coordination
between communication and power utilities
Annex A (informative) - Bibliography
Annex B (informative) - Example of calculations for
HV bus fault and LV bus and line fault
Annex C (informative) - Example of a GPR calculation
and volt-time area calculation
Annex D (informative) - Example of calculations for
uniform and nonuniform exposures
Annex E (informative) - Example of calculations for
double-ended supply feed and a telecommunication
line
Annex F (informative) - Examples of calculating the
resultant voltage between the electric power
station ground grid and a conductor that is
grounded at a remote location, such as a
telephone central office
Annex G (informative) - Modeling transfer of ground
potential rise
Annex H (informative) - Sample GPR calculations
Gives guidance for the calculation of power station GPR and LI voltages and guidance for their appropriate reduction from worst-case values for use in metallic telecommunication protection design. Information is also included for the determination of the following: a) The fault current and the earth return current levels; their probability, waveform, and duration; and the impedance to remote earthing points used in these GPR and LI calculations as well as the effective X/R ratio. b) The zone of influence (ZOI) of the power station GPR. c) The calculation of the inducing currents, the mutual impedance between power and metallic telecommunication facilities, and shield factors. d) The channel time requirements for metallic telecommunication facilities where non-interruptible channels are required for protective relaying.
| Document Type | Standard |
| Status | Current |
| Publisher | Institute of Electrical & Electronics Engineers |
| Supersedes |
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